Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/11410#discussion_r54678025
--- Diff:
repl/scala-2.11/src/test/scala/org/apache/spark/repl/ReplSuite.scala ---
@@ -296,6 +320,31 @@ class ReplSuite extends SparkFunSuite {
}
}
+ test("Datasets agg type-inference") {
+ val output = runInterpreter("local",
+ """
+ |import org.apache.spark.sql.functions._
+ |import org.apache.spark.sql.Encoder
+ |import org.apache.spark.sql.expressions.Aggregator
+ |import org.apache.spark.sql.TypedColumn
+ |/** An `Aggregator` that adds up any numeric type returned by the
given function. */
+ |class SumOf[I, N : Numeric](f: I => N) extends
+ | org.apache.spark.sql.expressions.Aggregator[I, N, N] {
--- End diff --
created https://issues.apache.org/jira/browse/SPARK-13611 for this issue
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